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:bouquet: An easy way to persist and run code block only as many times as necessary on Android.

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# Only

:bouquet: An easy way to persist and run code block only as many times as necessary on Android.

## Download
[![Maven Central](https://img.shields.io/maven-central/v/com.github.skydoves/only.svg?label=Maven%20Central)](https://search.maven.org/search?q=g:%22com.github.skydoves%22%20AND%20a:%22only%22)
[![Jitpack](https://jitpack.io/v/skydoves/Only.svg)](https://jitpack.io/#skydoves/Only)

#### Gradle
Add below codes to your **root** `build.gradle` file (not your module build.gradle file).
```gradle
allprojects {
    repositories {
        mavenCentral()
    }
}
```
And add a dependency code to your **module**'s `build.gradle` file.
```gradle
dependencies {
    implementation "com.github.skydoves:only:1.0.8"
}
```

## Usage
### Initialize
First, initialize the `Only` using `init()` method like below. 
This code can be initialized on `Application` class only once.
```kotlin
Only.init(context)
```

### onDo

Below codes will run the `showIntroPopup()` only three times using `onDo` method.
```kotlin
Only.onDo("introPopup", times = 3) {
  showIntroPopup()
}

// kotlin dsl
only("introPopup", times = 3) {
  onDo { showIntroPopup() }
}
```
Here is the Java codes.
```java
Only.onDo("introPopup", 1, () -> showIntroPopup());
```

### onDone
Below codes will run the `doSomethingAfterDone()` and `toast("done")` after run the `onDo` block codes three times.

```kotlin
Only.onDo("introPopup", times = 3,
  onDo = {
    showIntroPopup()
    toast("onDo only three times")
  },
  onDone = {
    doSomethingAfterDone()
    toast("done")
  })

// kotlin dsl
only("introPopup", times = 3) {
  onDo {
    showIntroPopup()
    toast("onDo only three times")
   }
  onDone {
    doSomeThingAfterDone()
    toast("done")
  }
}
```
Here is the Java codes.
```java
Only.onDo("introPopup", 1,
    () -> doSomethingOnlyOnce(), // onDo
    () -> doSOmethingAfterDone() // onDone
);
```

### onLastDo, onBeforeDone
We can do pre and post-processing using `onLastDo`, `onBeforeDone` options.
```kotlin
only("Intro", times = 3) {
 onDo {
 showIntroPopup()
 toast("onDo only three times")
 }
 onLastDo { // executes only once after finished onDo block 3 times.
 toast("finished onDo")
 }
 onBeforeDone { // executes only once before run onDone block.
 toast("starts onDo")
 }
 onDone {
 doSomethingAfterDone()
 toast("done")
 }
}
```
We can apply it for repeating x times. 
Below codes shows review-popup 3 times and checks the user reviewed or not in `onLastDo` block. 
If not, clear times using the `Only.clearOnly` method, and repeat it the first time again.
```kotlin
only("Intro", times = 3) {
 onDo { showReviewRequestPopup() }
 onLastDo { // executes only once after finished onDo block 3 times.
 if (!isRequested) {
 Only.clearOnly(this@only.name)
 }
 }
}
```

### Version Control
We can renew the persistence times for controlling the version using `version` option. 
If the version is different from the old version, run times will be initialized 0.

```kotlin
Only.onDo("introPopup", times = 3,
  onDo = { showIntroPopup() },
  onDone = { doSomethingAfterDone() },
  version = BuildConfig.VERSION_NAME // we can set manually. e.g. "1.1.1.1"
)

// kotlin dsl
only("introPopup", times = 3) {
  onDo { showIntroPopup() }
  onDone { doSomethingAfterDone() }
  version("1.1.1.1")
}
```

### Create Using Builder
We can run Only using `Only.Builder` class like below.
```kotlin
Only.Builder("introPopup", times = 3)
  .onDo { showIntroPopup() }
  .onDone { doSomethingAfterDone() }
  .version(BuildConfig.VERSION_NAME)
  .run()
```

### OnlyOnce, OnlyTwice, OnlyThrice
Here is some useful kotlin-dsl functions.

```kotlin
onlyOnce("onlyOnce") { // run the onDo block codes only once.
  onDo { doSomethingOnlyOnce() }
  onDone { doSomethingAfterDone() }
}

onlyTwice("onlyTwice") { // run the onDo block codes only twice.
  onDo { doSomethingOnlyTwice() }
  onDone { doSomethingAfterDone() }
}

onlyThrice("onlyThrice") { // run the onDo block codes only three times.
  onDo { doSomethingOnlyThrice() }
  onDone { doSomethingAfterDone() }
  version("1.1.1.1")
}
```

### Clear Data
We can optionally delete the stored `Only` target data or delete the whole `Only` data.
```kotlin
Only.clearOnly("introPopup") // clears a saved target Only data.
Only.clearAllOnly() // clears all of the target Only data on the application.
```

### View Extension
Below codes will show the `button` view only once.
```kotlin
button.onlyVisibility(name = "myButton", times = 1, visible = true)
```

### Toast Extension
Below codes will show toast only x times.
```kotlin
onlyToast("toast", 3, "This toast will be shown only three times.")
onlyOnceToast("toast1", "This toast will be shown only once.")
onlyTwiceToast("toast2", "This toast will be shown only twice.")
onlyThriceToast("toast3", "This toast will be shown only thrice.")
```

### Marking
We can mark data to the Only target.
```kotlin
only("introPopup", times = 3) {
  onDo { showIntroPopup() }
  onDone { doSomethingAfterDone() }
  mark("abc") // marks only once when run by kotlin dsl or builder class.
}

Only.mark("introPopup", 3) // changes marking using mark method.
val marking = Only.getMarking("introPopup") // gets the marked data.
```

### Debug Mode
Sometimes on debug, we don't need to persist data and replay onDone block. 
`onlyOnDoDebugMode` helps that ignore persistence data and onDone block when initialization. It runs only onDo block.
```kotlin
val only = Only.init(application)
if (BuildConfig.DEBUG) {
 only.onlyOnDoDebugMode(true)
}
```

## Usage in Java
Here are some usages for Java developers.
```java
int times = Only.getOnlyTimes("IntroPopup") ;
if (times < 3) {
 Only.setOnlyTimes("IntroPopup", times + 1);
 showIntroPopup();
}
```
### Java Supports
we can run `Only` in our java project.
```java
Only.onDo("introPopup", 1,
 new Runnable() {
 @Override
 public void run() {
 doSomethingOnlyOnce();
 }
}, new Runnable() {
 @Override
 public void run() {
 doSOmethingAfterDone();
 }
});
```
Or we can run using `Only.Builder` like below.
```java
new Only.Builder("introPopup", 1)
 .onDo(new Runnable() {
 @Override
 public void run() {
 doSomethingOnlyOnce(); 
 }
 })
 .onDone(new Runnable() {
 @Override
 public void run() {
 doSOmethingAfterDone();
 }
 }).run(); // run the Only
```
### Java8 lambda expression
We can make it more simple using Java8 lambda expression. 
Add below codes on your `build.gradle` file.
```gradle
android {
 compileOptions {
 sourceCompatibility JavaVersion.VERSION_1_8
 targetCompatibility JavaVersion.VERSION_1_8
 }
}
```
Then you can run the Only like below.
```java
Only.onDo("introPopup", 1,
 () -> doSomethingOnlyOnce(), // onDo
 () -> doSOmethingAfterDone() // onDone
);
```
### Custom util class
We can create custom util class like what Kotlin's `onlyOnce`.
```java
public class OnlyUtils {

public static void onlyOnce(
      String name, Runnable runnableOnDo, Runnable runnableOnDone) {
    new Only.Builder(name, 1)
        .onDo(runnableOnDo)
        .onDone(runnableOnDone)
        .run(); // run the Only
  }
}
```

## Find this library useful? :heart:
Support it by joining __[stargazers](https://github.com/skydoves/only/stargazers)__ for this repository. :star: 
And __[follow](https://github.com/skydoves)__ me for my next creations! 🤩

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
```

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